|Publication number||US6922735 B2|
|Application number||US 09/822,753|
|Publication date||Jul 26, 2005|
|Filing date||Mar 30, 2001|
|Priority date||Apr 3, 2000|
|Also published as||US20040205744|
|Publication number||09822753, 822753, US 6922735 B2, US 6922735B2, US-B2-6922735, US6922735 B2, US6922735B2|
|Inventors||Kenneth Hung-Yi Chang|
|Original Assignee||Texas Instruments Incorporated|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (18), Referenced by (22), Classifications (18), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application claims the priority under 35 U.S.C. 119(e)(1) of copending U.S. provisional application No. 60/194,258 filed on Apr. 3, 2000, incorporated herein by reference.
The invention relates generally to data processing and, more particularly, to management of co-processor information.
Data processing systems (including single-chip systems) which utilize one or more host processors (for example microprocessors) and one or more co-processors (for example further microprocessors or digital signal processors) under control of the host processor(s) are well known in the art. In such systems, a co-processor is typically configured to perform desired functions by storing associated program information in a ROM (or other program memory) of the co-processor. The operational capability of the co-processor thus corresponds to, and is limited by, the functionality defined by the program(s) stored in its ROM.
It therefore becomes advantageous to provide systems wherein the host processor(s) can dynamically download desired programs to the co-processor(s) in response to user requests. For example, a user of a mobile telephone might initially wish to configure the mobile telephone's co-processor(s) to perform speech coding functions in support of voice communications, and might later wish to configure the co-processor(s) to perform functions in support of wireless internet access. Accordingly, in this example, the host processor(s) would first download into the co-processor(s) a program or programs for configuring the co-processor(s) as a speech coder, and would thereafter download a program or programs for configuring the co-processor(s) as an internet access port.
Different programs (also referred to herein as objects) have different platform requirements, for example, program memory size, data memory size, clock speed, etc. Therefore, a given program may not be suitable for execution on a given co-processor. The suitability of a given program for execution on a given co-processor can be determined by a host processor before downloading the program to the co-processor, provided the program developer can provide to the host processor information indicative of the platform requirements of the program. In systems with multiple co-processors, the host processor may be able to use the platform requirement information at runtime to identify an available co-processor which satisfies the platform requirements of the program. The host processor can then download the program to the identified co-processor.
In conventional practice, non-program information has typically been stored separately from the executable file that contains the program. This practice disadvantageously dictates the use of an auxiliary data source for non-program information, for example an SQL engine, Microsoft's registry, or even a simple text file. This also disadvantageously requires that two separate files be handled, the executable and the non-program information file.
It is desirable in view of the foregoing to provide for efficient communication of non-program information, such as platform requirement information, from the program developer to the host processor at runtime.
The present invention provides for efficient communication of non-program information, e.g. platform requirement information, from the program developer to the host processor at runtime. The non-program information is integrated along with the corresponding program information into an executable file which is used by the host processor to download the program information to a selected co-processor.
The exemplary system of
According to the invention, a given executable file stored in the file storage facility 17 includes not only program information which the co-processor uses to perform the desired function, but also includes non-program information associated with the program information. For example, the non-program information could include platform requirement information such as described above, setup parameters, or other general properties of the program. The API 16 distinguishes the program information from the non-program information, and provides both sets of information to the server 15. Based on the non-program information, the server can, for example, make a determination as to which of a plurality of available co-processors is suitable for execution of the desired program, and can then forward the program information to the selected co-processor.
Each of the assembly/linker files 32, 33 and 34 (which include the aforementioned linker command files) is combined with its associated program information (i.e., code and data) at 36, 37 and 38, which program information is contained in conventional executable files (e.g. COFF files). The combining operation can be performed by a conventional compiler/linker 31. The compiler/linker 31 combines the data in the assembly/linker files 32, 33 and 34 with the program information from the files 36, 37 and 38, respectively, to produce corresponding executable files, in this example COFF executable files 39, 40 and 41, that include both program information (from 36, 37 and 38) and non-program information (from 32, 33 and 34).
Each of the executable files 39, 40 and 41 illustrated in
Referring again to
Executable files that conform to COFF, for example the COFF utilized by Texas Instruments Incorporated, support non-downloadable data regions. Using this feature of COFF, the compiler/linker 31 of
It should also be noted that the invention described above with respect to
The above-described integration of non-program information with program information in an executable file permits non-program information to be communicated from the developer to the server of the host processor in an efficient manner, and without increasing the size of the runtime program. This is accomplished by, for example, taking advantage of the non-downloadable data section feature of COFF executables. The invention eliminates the need for an auxiliary database on the host processor, thus saving the resources required by a traditional database, which is particularly advantageous for resource-constrained systems such as a system on a chip. The invention further simplifies the process of downloading a program to a co-processor because both program and non-program information can be provided in a single file, thereby advantageously avoiding the conventional requirement of handling two separate files. Also, as described above with respect to
Although exemplary embodiments of the invention are described above in detail, this does not limit the scope of the invention, which can be practiced in a variety of embodiments.
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|U.S. Classification||710/5, 710/32, 710/33, 710/11, 710/107, 710/6, 710/10, 710/7, 717/168, 717/121, 710/36, 710/31|
|International Classification||G06F15/00, G06F3/00, G06F9/445, G06F9/44|
|May 29, 2001||AS||Assignment|
|Dec 19, 2008||FPAY||Fee payment|
Year of fee payment: 4
|Jan 2, 2013||FPAY||Fee payment|
Year of fee payment: 8